Brake mechanism for chain track vehicles



W. TURN BULL.

BRAKE MECHANISM FOR CHAI-N.TRACK VEHICLES APPLICATION 'mzo JAN. 1,1919.

2 SHEETS-SHEET l- 0 PM o o o o o o o O o o o 7 O O O 0 N o o o rr 1% g o o o o k I A /NVENTOR O W 9 '0 0 Q WiZ-Ziafiz YZafizzZzzZ-Z N 1 ws q I Famed Feb. 28, 1922.

W. TURNBULL. BQ'RAKE MECHANISM FOR'CHAiN TRACK VEHIVCLEI'S.

APPLICATION FIQLIEDV JAN. 7.1919.

Patented Feb. 28

2 S H t E l S- INVENTOR 71 275 iqwz El /(6a?! 7 ATTORNEY5' ill sit-EH FOR Gill/$.13; TRACK. VEHICLES.

application filed Senuary T all whom it may concern:

Be it known that 1, WILLIAM TURNBULL, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented new and useful lmprovenients in Brake Mechanism for Chain Track Vehicles, of which the following is a specification.

This invention relates to a braking mechanism or a brske attachment for chain track vehicles. In its present embodiment, it has been shown as applied to trailer wagons but manifestly its use is not limited to any special type or design of self-laying tracs'. vehicle.

When trailers are connected together in train and by attractor over irregular and unlevel terrain it has been quite difficult to maintain control of the various trailer wagons, due to conditions which act to divert the individual wagon from the course of travel described by the tractor.

it has been one principal object of the in vention to provide means for individually controlling the movement of a trailer and thus insuring that it will not break loose from the train or run into the preceding trailers thereof, to throw them out of their proper position.

Gther objects will appear hereinafter. The invention is illustrated by way of example in the accompanying drawings, in which I Fig. 1 indicates the completely assembled trailer with a portion of its running gear broken away to more clearly disclose the control mechanism.

Fig. 2 is a view in vertical section illustrating the brake mechanism and the controi thereof.

Fig. 3 is a view in section and elcvation as seen on the line 3-3 of Fig. 2.

Fig. i is a view in perspective disclosing one-of the bralre shoes used in the present invention.

Referring to the drawings, indicates main frame. Mounted upon this main frame is arectangular body 11, preferably of. metal construction and formed with an end gate 12, for convenience in loadin Supporting the trailer and disposed along" opposite sides thereof at s. point substantislly midwayits length are self-laying chain traclr units 13. The truck units consist or? roller truck ironies i lhenesth which leadsupporting rollers are mounted and at Specification of Letters Patent. Pgmgn 'gggli 19gb, 2: 3,,

the opposite ends of which idler wheels 1% and 17 are rotatably disposed.

Embracing the elements previously indicated is a chain truck 18 which passes around the idlers and upon which the truck rollers 15 are adapted to constantly rest. The truck frames 14 are provided with. standards 19, substantially midway their length, through which a crosswise extending stabilizer 20 extends beneath the main frame 10 of the trailer. A cross beam 23. is mounted in conncction with the stabilizer shaft and affords a vertical guide therefor as it slides between hangers 22 and 23. These hangers are tired in spaced relation to each other and project downwardly from the opposite side rails oi the main frame. Helical springs are interposed between the main frame and the cross beam and thus allow said hea'ni yield ably vertical movement, this structure at the same time permitting individual vertical pivotal movement of the separate truck units as well as bodily movement. his truck mounting forms the subject matter of another application, Serial No. 276,039, tiled concurrently herewith.

Reference being had to Figure 3 it will e noted that the truclr rollers 15 are spaced in relation to each other and thus provide a triangular opening within which brake shoes 25 may be positioned. @ne of these shoes is clearly shown in Figure at as having a central rib 26 at the opposite ends of which the complementary shoes 25 are formed. These shoes have upper angular races adapted to clear the periphery of the rollers 15 and fiat under faces adapted to be brought to bear upon the chain track 18. y

A link opening 27 is formed in the central web and is provided to receive a draw link 28. This link is pivot-ed. within the opening by means oi holt 29 passing through the bolt opening 30 of the web. The link 28 extends upwardly and at an angle to the vertical and there cog-egos the free end of a crank lever 31, it being; pivotslly secured thereto by a bolt 32. The cranl: lever is one of a plurality of such levers which are formed integral with a sleeve 33 cerried upon a shaft 34:. This shaft is supported by brackets 35 at the opposite ends of the sleeve. These hrcclrets are in turn secured to the hody casting of the truck frames and extend. downwsrdly between the channel elements thereon The sleeve 353 is formed with an upwardly lever ich is connected e. lorelite rod. e rod extends transversely of ems soil therebeneziih, passing eruck units to a pointecl e other, is connected to one of 36 by means of o yoke 38 and an 1111i 3;), and

the end of the lever interposed between 37, being PXVOlJQCX to hers. crsnlr is carried upon a he truck frames and by This emnl: has a clown siding ermpivoted to :i bolt $23 so forms a connection between the reel 3'? and the shackle member 420. eml the crank is connected drew cable which passes across "Eilsfi'l main frame and upwardly l1 nn'anyle guide to be connected simi; i=6. The shaft is carried -17 and i8 fixed to ilie of the trailer and is adapt-- o. vertically by means of a, r wheel is fitted with a 50 in roiislazri mesh with s gear cl upon the shaft l6, it being me lisi the opening through the gear 7 io agree with il'll external e slurfi, and Mist by rotation 1 slur-fr. 46 may be raised or 13 the present instance and .58 disposed in eon elation :i see; This seat is i sceommorleie or: opersioryoine oil each of lire treilers. 1. fire box type am is carried. aclreis 53 extending outwardly rly, beneath the seat, A. fool extends forwardly from the conveniently supports the operator lows him to manipulate the immi- '0 apply or release ilie brelte mem- .rom engagement with the lower o of trailers are condrew Mrs if and suitable 06 to Each other owl the izreo- J l. e Lani; is assigned to each of the :tecl occupies the :2 When the eloeg level ground no oi;- loe given i-iie running reer. dowzi Jewel; rotsce lire l1 seclwlieel i?) to upon lie rubles M in. direction of irirliee cl in li igizre 2d foliolever EU; omi i llfi ogrgle joint, this (ll-swingcs vie will iioree the lower evers (low .wsreily Wiih l. cause the: i'li'lllIQ shoes I oer the chem r new be vsrie to the other lever by- .1 sliiielrle ber 40, the shackle bar Cally movable gredes the individual es desired. li hen the lined-Wheel is oper oted to release the cable e contreel'ion spring W'lnle have shown the preferred form of my invention as now known to me it Wlll be understood that verious changes in the combination and construction, and arrange ment of parts, may be model) those skilled in the art, without departing from the spirit of the inveneion as claimed.

Having thus described my invention, 'Wh'et claim and desire to secure by Letters ateni; is

1. In ii chain track vehicle, a truck mechanism including a roller carrying frame made up oi spaced side plates, and en en(.l less" flexible track upon which the rollers operate, a brake shoe carried by the roller frame, guide members on the side plates of the frame in which the brake shoe is 'verticelly movable, and operating iiieclisnisni to depress the shoe into frictional engagement with the track whereby to rei'errl movement.

- In ii Clllllll track vehicle, a truck mechanism including; a roller carrying frame insole up of spaced side plaleseocl in and less flexible truck upon which ilie rollers operate, a brake shoe carried by the roller frame, guide members on the side plates of the frame in which the b eke shoe is vertioind toggle mechanism for de pressing the shoe into frictional engagement with the track whereby'to retard movement,

3. In a vehicle, e main frzm'ie, a truck ii'irfelionism at each side thereof inelui'liog 2i. roller carrying; frame and en endless track on which the rollers operate, a bmlre shoe carried by each roller frame for cooperation with tlieloirer run of the track, mechanism for each shoe operative to raise and lower the some, a transverse rod connecting opposite raising and lowering mechanisms, and means carried by the main frame for impurring reciproeai'zing movement to the reel whereby to actuate the raising and lowering mechanisms.

4. in a vehicle, a main frame, a truck mechanism at eaeh side thereof including a roller carrying iirome and an endless traclr on which the rollers operate, :i broke shoe carried by each or the roller frames for eooperetion with tlie lower run of the oracle e bell-erzmk lever mounted 051 each truck frame, a toggle link connecting. each bell crank with the adjacent sl'ioe, ev trimsversc rocl connecting opposite bellwrzmlr levers to gellier, and means for impsriiiigr recipro-, raising-movement to ilie rorl whereby to so, truiie lJllG brake shoes,

Wl'LL lzll fi 

